From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfram Sang <wsa@the-dreams.de>
Subject: Re: [PATCH] i2c: designware: use {readl|writel}_relaxed instead of
 readl/writel
Date: Fri, 23 Jan 2015 17:09:26 +0100
Message-ID: <20150123160926.GE9592@katana>
References: <1418279201-3886-1-git-send-email-jszhang@marvell.com>
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In-Reply-To: <1418279201-3886-1-git-send-email-jszhang@marvell.com>
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To: Jisheng Zhang <jszhang@marvell.com>
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
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On Thu, Dec 11, 2014 at 02:26:41PM +0800, Jisheng Zhang wrote:
> readl/writel is too expensive especially on Cortex A9 w/ outer L2 cache.
> This introduces i2c read/write errors on Marvell BG2/BG2Q SoCs when there
> are heavy L2 cache maintenance operations at the same time.
>=20
> The driver does not perform DMA, so it's safe to use the relaxed version.
> From another side, the relaxed io accessor macros are available on all
> architectures now, so we can use the relaxed versions instead.
>=20
> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>

Applied to for-next, thanks! Just replaced "errors" with "delays" in the
description.


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